Salivary Glands and Lymphatics Flashcards
WHat is the purpose of lymphatic system?
Circulates/filters lymph, initiates immune response.
What are the steps of Lymph Node development?
- Lymphatic Epithelial cells leave blood vessels
- Aggregate to form lymph sacs with mesenchyme
- Form nodules
- Nodules surrounded by sinuses
- Lymphatic cells migrate from mesenchyme, Thymus, and marrow.
- Capsule surrounds nodules to form the node.
Describe the flow of lymph fluid.
Lymph–>afferent lymphatic vessels–>node–>collects in medulla–>drains out efferent vessels at hilum.
What surrounds the lymph node? What extends in the node?
Connective tissue forms capsule around the node. Trabeculae extend into the node.
How are tonsils formed?What forms that can trap debri?
Same as lymph nodes, but not encapsulated. Forms tonsillar crypts.
What is the Tonsillar Ring also called? Purpose?
Waldeyer’s Ring. Immunological “first pass” protection to digestive and respiratory tract.
What are the 4 main tonsils of the Tonsillar Ring?
- Palantine
- Tubal
- Pahryngeal (Adenoids)
- Lingual
How many salivary glands are there? What types?
- 2 Parotid
- 2 Submandibular
- 2 Sublingual
What are salivary serous secrestions? Mucous?
Serous=watery, enzymes,
Mucous=Thick, glycoproteins.
What are the three types of salivary ducts? What do they do?
- Intercalated: Receive fluid from Acinus
- Striated: Manipulates/changes the saliva
- Excretory: excretes fluid into oral cavity
What are the characteristics of the Parotid glands?
Largest gland. Serous secretion.
What are the characteristics of the submandibular glands?
Makes most of saliva. Mixed mostly serous secretion.
What are the characteristics of the sublingual gland?
Only gland without a capsule. Mixed mostly mucous secretion.
